How to use discount?

[mohammad1381]

make an example for using discount please.

[alexantr]

Example with personal discount for logged users:

1. create behavior:

<?php

namespace app\behaviors;

use Yii;
use yz\shoppingcart\DiscountBehavior;

class PersonalDiscount extends DiscountBehavior
{
    /**
     * @param \yz\shoppingcart\CostCalculationEvent $event
     */
    public function onCostCalculation($event)
    {
        // saved in percentages
        $discount = Yii::$app->user->identity ? Yii::$app->user->identity->discount : 0;
        $event->discountValue = $event->baseCost * ($discount / 100);
    }
}

2. attach behavior to cart:

Yii::$app->cart->attachBehavior('personalDiscount', ['class' => 'app\behaviors\PersonalDiscount']);

3. result:

<p>Total cost: <?= Yii::$app->cart->getCost() ?></p>
<p>Total cost with discount: <?= Yii::$app->cart->getCost(true) ?></p>

[alexantr]

Instead step 1 & 2 can use this variant:

Yii::$app->cart->on(ShoppingCart::EVENT_COST_CALCULATION, function ($event) {
    $discount = Yii::$app->user->identity ? Yii::$app->user->identity->discount : 0;
    $event->discountValue = $event->baseCost * ($discount / 100);
});